Designation: A – 90b (Reapproved ). Standard carbon steel bars, hot rolled 1 in. diameter by 10 ft, ASTM A dated ___. SAE According to standards. ASTM A b Hot Rolled. Number. ASTM A /AM: Cold-drawn. Equivalent. USA AISI/SAE. Italy UNI. (ASTM) (Continued) ASTM A51 1 () ASTM A51 () ASTM A51 3 (a) ASTM A/AM () ASTM A () ASTM Ab.

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SBQ steels are used in safety critical applications.

Hot-rolled round section. Trade House BMZ JSC

Leave a Reply Cancel reply Your email address will not be published. Posted by Satyendra on May 27, in Ispat Digest 0 comments. Most producers see ties to the automotive industry as the key drivers of the SBQ steel grades.

Although there is no single definition, special bar quality steel can be defined as steel that moves rotates, twists or bends rather than stays still whilst in use. Donate Grateful for your donation!

Pipe billet

Your Alert Profile lists the documents that will be monitored. ASTM standard A b covers specification for plain carbon special quality bar steels for applications which includes forging, heat treating, cold drawing, machining and many structural uses.

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You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. These steels are produced with more precise dimensions and chemistry.

The term is used to describe steel long products for more demanding processing or end-use applications which cannot be met by merchant quality grades. These steels have superior mechanical properties and defect free surface. As the voice of the U. A guide for the selection of steel bars is contained in Practice A Sulphur content in the 15 grades of the resulfurized steels also have different ranges of sulfur with a minimum of 0. The internal quality of these steels is very important since machining and bending activities are involved during the processing of these steels in subsequent stages.


Similar is the case of resulfurized and rephosphorized steels. Hot-wrought special quality carbon steel bars are produced in cut lengths and coils; the manufacturer should be consulted regarding sections and sizes available in coils, produced to a chemical composition. The chemistry of these steels is more complex than merchant quality steels.

The range of carbon content in these steels varies from grade to grade with minimum of 0. Special bar quality SBQ steels represents a wide variety of higher quality carbon and alloy steels. SBQ a57 are sstm the higher end of the quality spectrum in both metallurgical consistency and dimensional accuracy. Subscription pricing is determined by: SBQ steels are used for bolts, springs, cable wires, chains, tyre beads and many similar applications in automotive industry.

Steel cleanliness can be achieved through the integrated route or through an x576 refining step and cleaner iron bearing inputs into an EAF in a mini mill.

These steels are generally machined, forged or cold drawn during subsequent processing. Your email address will not be published. Both these terms refer to steel types as well as to bar products, and as they are often associated with the steel grades, they refer to billet and slab as well as bar.

These steels are produced both in cut lengths and coils. You may delete a document from your Alert Profile at any time.

Special Bar Quality steels

This makes the production route of these steels a bit complex. Fig 1 Some of the uses of SBQ steels in automotive industry. We have no amendments or corrections for this standard. The specification of SBQ steels may range from plain carbon and carbon manganese steels to alloy and stainless steels containing different percentages of aluminum, nickel, chrome and other alloying elements.


Add to Alert PDF. This standard is also available to be wstm in Standards Subscriptions. Some end uses of these steels may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat treatment or surface finishes.

Need more than one copy? Standards Subsctiption may be the perfect solution. The products may also include hot rolled steel bars, cold finished steel bars. This standard is not included in any packages. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.

These steels may have many grades. Please first verify your email before subscribing to alerts. Already Subscribed to this document. Special quality bar applications include forging, heat treating, cold drawing, machining, and many structural uses.

SBQ aetm are used for wind turbine components, bearings and seamless tubes. Internal metallurgical quality and consistency is also achieved by a meaningful reduction during the rolling process.

Special Bar Quality steels |

Special bar quality steel may have products of shapes which can be classified into round, square and hexagonal bars. The petroleum industry uses them to produce valves and pipeline couplings for oil extraction. This specification has got 53 grades under the category of non-resulfurized steels, 15 grades under the category of resulfurized steels and 5 grades atm rephosphorized and resulfurized category.